Safety-envelop.



S. HURWITZ.

SAFETY ENVBLOP.

APPLICATION FILBDooT. 15, 1914.

Patented Feb. 23, 1915.

Witnesses MaI/"7720011:

Attorneys..

'HE NORRIS PETERS CO., PHOTO-LITHO.. WASHINGTDN4 D4 CA SAMUEL HURVIITZ,F WILKES-BARRE, PENNSYLVANIA, ASSIG-NOR OF ONE-HALF TQ MAX HURWITZ, 0FWILKES-BARRE, PENNSYLVANIA. i

SAFETY-ENVELOP.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application led October 15, 1914. Serial No. 866,829.

To all whom t may concern.'

Be it known that l, SAMUEL HURwITz, a subject of the Czar of Russia,residing at lfvTilkesBai-re, in the county of Luzerne and State ofPennsylvania, have invented a new and useful Safety-Envelop, of whichthe following is a specification.

The present invention appertains to envelops and aims to provide a noveland inlproved safety envelop.

The present invention contemplates the provision of a safety envelophaving unique sealing means, whereby it is impossible to open the sameafter it has been sealed, without mutilating or destroying the envelopto leave clear evidence of the tampering and to provide for thedetection of the unwarranted tampering, the sealing means alsopreventing the envelop from being steamed open, as well as preventingthe same from being pried open.

With the foregoing and other objects in view, which will appear' as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

The invention has been illustrated in its preferred embodiment in theaccompanying drawing, wherein Figure l is a plan view of the blank fromwhich the envelop is folded. Fig. .2 is a plan view of the enveloppartially completed and illustrating the top and bottoni `Flaps closedin dot and dash lines. Fig. 3 is an enlarged detail illustrating themanner of interlocking the end flaps. Fig. 4 is lenlarged section of theenvelop in sealed condition.

The blank from which the envelop is formed, and which may be cut orstamped from paper or other suitable material, embodies a front or faceportion l, having the tapered end flaps 2, the upper or closure flap 3at its upper edge and the lower or bot` tom flap 4 at its lower edge.The upper and lower flaps 3 and 4 are preferably triangular in contour,as seen in Fig. 1.

The upper or closure flap 8 is provided at its apex or free portion,with a bendable unapertured tab 5 which is adapted to be bent backagainst the inner side of the closure flap 3, and the edge portions ofthe flap 3 are apertured, as at 6, and provided with glue or otheradhesive material upon their inner sides. The inner side of the tab 5 isalso preferably provided with glue or mucilage but is not apertured.

The lower or bottom flap 4l is provided with a slot 7 adjacent its freeorapical portion, extending longitudinally of the blank, and the flap 4is further provided with a tab 8 projecting from its free portion orapex. The edges of the Hap 4 are apertured, as at 9, and supplied withglue, mucilage or the like, upon their inner sides.

The free ends of the end flaps .2 are formed into tongues 10, which areadapted to overlap whenthe end flaps 2 are folded back upon the front orbody portion 1, and each of the tongues 10 is provided with a T-shapedslot 11, the heads l2 of which eX- tend longitudinally, and the trunksof which extend laterally to the edges of the tongues. The trunks of thetwo slots l1 project in opposite directions, or to the upper and loweredges of the respective tongues 10, whereby the two tongues are adaptedto interlock as seen in Fig. 3, and as will hereinafter more fullyappear.

In order to enable the ends of the envelop to be torn lopen readily bythe recipient thereof, threads or strings 13 are glued or otherwisesecured upon the inner side of the envelop at the juncture of the frontl and the end flaps 2.

Prior to the use of the envelop, the end flaps 2 and bottom flap 4 aresecured together to provide the pocket for receiving the letter, or thelike. This is accomplished by first folding the end flaps 3 upon thefront l, so that the tongues l0 overlap, the tongues l() being movedlaterally, as indicated in Fig. 3, to cause the slots 11 to interlockfor holding the end flaps 2 in place, and whereby the heads 12 of thesaid slots ll will register at one side for pro viding a slot in theoverlapped portions of the tongues 10. The bottom flap 4: is then foldedover the lower edges of the fiaps 2 and the tab 8 is inserted throughthe heads l2 of the slots 11, the overlapped tongues 10 and tab 8 beingglued or otherwise secured together and the edges of the bottom flap lbeing pasted upon the lower edge portions f the tab 5 of the closureflap is bent back inwardly and inserted upwardly through the slot 7 inthe bottom flap 4 or back of the envelop, the glue upon the closure flap3 and the tab 5 having been previously moistened, s0 that the closureiiap 3 will be cemented upon the end flaps 2 and bottom Hap 4, while thetab 5 of the closure flap will be glued upon the interior of the tongues10 and the apical portion of the bottom flap 4. In this manner theapical portion of the closure flap is secured upon thev interior of theenvelop and under four thicknesses or layers of material, whereby it isimpossible to steam or pry open the apical or free portion of theclosure flap, without mutilating or destroying the envelop so as toleave clear evidence of the tampering. The edges of the flaps 3 and 4being perforated as specied, will prevent them from being pried loose,since any attempt to pry the iiaps 4 and 3 loose, would cause the edgeportions to be torn, and to thereby enable the recipient of the letterto detect the tampering. The ends of the envelop may be readily tornopen, by tearing one cornerof the envelop, in which event thecorresponding thread or cord 13 may be pulled loose to tear the entireend of the envelop open, so that the letter or contents of the envelopmay be readily withdrawn.

In view of the foregoing, the advantages and capabilities of the presentinvention will be obvious to those versed in the art, it is thought,Without further comment being deemed necessary.

Having thus described the invention, what is claimed as new is 1. Anenvelop embodying a front having end, bottom and upper closure flaps,thc free portions of the end iaps being overlapped and provided withregistering slots, the bottom iiap being folded over and secured to theend flaps, and having a tab at its free portion inserted through thesaid slots, the bottom flap having a slot adjacent the tab, the said taband overlapped por tions of the end flaps being secured together and thesaid tab holding the end aps against separation, the upper closure iiaphaving a tab at its free portion and the last mentioned tab beingbendable inwardly and insertible upwardly through the slot of the bottomflap to be glued to the inner sides of the overlapped portions of theend iiaps.

2. An envelop embodying a front having end, bottom and upper closureflaps, the free ends of the end iaps having tongues provided withT-shaped slots, the heads of the slots extending longitudinally and thetrunks of the said slots extending in opposite directions to therespective edges of the said tongues, whereby the tongues areinterlockable to bring the heads of the slots into register, and thefree portion of the bottom Hap having a tab insertible through the headsof the said slots.

In testimony that I claim the foregoing as my own, I have hereto aiiixedmy signature in the presence of two witnesses.

SAMUEL HURWITZ. Witnesses P. A. llniXELL, MAX HURWITZ.

Copies of this patent may be obtained for tive cents each, by addressingthe Commissioner of Patents, Washington, D. C.

